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Separated-point inflow type Fenton reagent oxidation treatment device and method for treating wastewater

A technology of oxidation treatment and point-by-point water intake, which is applied in water/sewage treatment, chemical instruments and methods, and wastewater treatment in processing processes, etc., can solve the problems of low utilization rate, improve utilization rate, reduce usage, and increase treatment The effect of water volume

Inactive Publication Date: 2015-01-07
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the invention is to overcome the deficiencies in the prior art, to solve the problem of repeated adjustment of pH value, Fe 3+ Shortcomings such as low utilization rate provide a high-efficiency, low-cost Fenton reagent oxidation process and device

Method used

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  • Separated-point inflow type Fenton reagent oxidation treatment device and method for treating wastewater
  • Separated-point inflow type Fenton reagent oxidation treatment device and method for treating wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] By adjusting the second pump, the waste water flow rate is 10L / h and enters the first pH value adjustment tank; the first pump is adjusted so that the waste water flow rate is 3L / h and enters the second pH value adjustment tank;

[0038] By adjusting the addition of sulfuric acid in the sulfuric acid storage tank to the first pH value adjustment tank, so that the pH value of the first pH value adjustment tank is 4, the hydraulic retention time of waste water is 20min;

[0039] The hydraulic retention time of the fluidized column is 60min, and the ferrous sulfate aqueous solution is stored in the ferrous sulfate solution storage tank, wherein FeSO 4 ·7H 2 The mass percentage of O is 2wt%, and the amount added to the fluidized column is 5LFeSO per ton of waste water 4 ·7H 2 The aqueous solution of O; store hydrogen peroxide in the hydrogen peroxide storage tank, the mass percent of hydrogen peroxide is 30wt%, and in the fluidized column, the addition is 0.2L hydrogen pe...

Embodiment 2

[0044] By adjusting the second pump, the waste water flow rate is 10L / h and enters the first pH value adjustment tank; the first pump is adjusted so that the waste water flow rate is 1L / h and enters the second pH value adjustment tank;

[0045] By adjusting the addition of sulfuric acid in the sulfuric acid storage tank to the first pH value adjustment tank, so that the pH value of the first pH value adjustment tank is 3, the hydraulic retention time of waste water is 15min;

[0046] The hydraulic retention time of the fluidized column is 30min, and the ferrous sulfate aqueous solution is stored in the ferrous sulfate solution storage tank, wherein FeSO 4 ·7H 2 The mass percentage of O is 1wt%, and the amount added to the fluidized column is 1 LFeSO per ton of waste water 4 ·7H 2 The aqueous solution of O; Store hydrogen peroxide (being the aqueous solution of hydrogen peroxide) in the hydrogen peroxide storage tank, the mass percent of hydrogen peroxide is 25wt%, and in flu...

Embodiment 3

[0051] By adjusting the second pump, the waste water flow rate is 20L / h and enters the first pH value adjustment tank; the first pump is adjusted so that the waste water flow rate is 1L / h and enters the second pH value adjustment tank;

[0052] By adjusting the addition of sulfuric acid in the sulfuric acid storage tank to the first pH value adjustment tank, so that the pH value of the first pH value adjustment tank is 3.5, the hydraulic retention time of waste water is 20min;

[0053] The hydraulic retention time of the fluidized column is 40min, and the ferrous sulfate aqueous solution is stored in the ferrous sulfate solution storage tank, wherein FeSO 4 ·7H 2 The mass percentage of O is 1.5wt%, and the amount added to the fluidized column is 3LFeSO per ton of waste water 4 ·7H 2 The aqueous solution of O; Store hydrogen peroxide (being the aqueous solution of hydrogen peroxide) in the hydrogen peroxide storage tank, the mass percent of hydrogen peroxide is 28wt%, and in ...

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Abstract

The invention discloses a separated-point inflow type Fenton reagent oxidation treatment device and a method for treating wastewater. The device comprises a wastewater storage tank, a first pH value adjusting tank, a fluidization column, a second pH value adjusting tank and a settling pond. The method comprises the following steps: adding sulfuric acid into the wastewater to adjust the pH value; adding a FeSO4 solution and an H2O2 solution; after oxidizing reaction, adding untreated wastewater, NaOH and a polyacrylamide solution to be uniformly stirred; and then discharging the settled wastewater with standard level by virtue of the settling pond. By using alkalinity of the untreated wastewater to replace H<+> in NaOH and water, the use level of the NaOH agent is reduced. Insoluble colloids and hydrophobic substances in the untreated wastewater can be removed in the Fe(OH)3 settling process, so that the utilization ratio of iron mud is improved.

Description

technical field [0001] The invention belongs to the field of water pollution control, and more specifically, relates to a device and a method for advanced treatment of pulping and papermaking wastewater by the point-inflow type Fenton reagent oxidation method, which can effectively utilize the Fe produced by the Fenton reagent. 3+ , Reduce the amount of NaOH used, and at the same time have the characteristics of increasing the amount of treated water. Background technique [0002] Pulping and papermaking wastewater has the characteristics of high pollutant concentration and poor biodegradability, which poses a serious threat to the ecological environment. At present, the pulping and papermaking wastewater treatment adopts the "physicochemical-anaerobic-aerobic" method, and there are still a large amount of organic matter that is difficult to degrade in the effluent, which cannot meet the limit specified in the "Water Pollution Discharge Standards for the Pulp and Paper Indus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F103/28
CPCC02F9/00C02F1/66C02F1/722C02F2103/28
Inventor 王灿潮保亭方帅
Owner TIANJIN UNIV
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